Which three steps are required when configuring extension mobility in Cisco Unified Communications Manager? (Choose thre

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Which three steps are required when configuring extension mobility in Cisco Unified Communications Manager? (Choose three.)

A. Create the extension mobility IP Phone Service.
B. Check the Home Cluster checkbox on the End User Configuration page.
C. Check the Enable Extension Mobility checkbox on the Directory Number Configuration page.
D. Unsubscribe all other services from the Cisco IP Phone.
E. Create a user Device Profile.
F. Subscribe the extension mobility IP Phone Service to the user Device Profile.